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Total change in entropy, what am I missing?

  1. Jan 18, 2009 #1
    A 20.0 -kg box having an initial speed of 1.0 m/s slides along a rough table and comes to rest.
    Estimate the total change in entropy of the universe. Assume all objects are at room temperature (293 K).

    I don't understand how to answer this problem. It feels like I wasn't given enough information to solve for Delta S.
  2. jcsd
  3. Jan 18, 2009 #2

    Andrew Mason

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    Assume that the kinetic energy of the box is dissipated as heat and that this heat is absorbed by the table and room at a constant temperature (ie the temperature of the table and room does not change).

    Hint: Since the box does not lose any heat, there is 0 change in the entropy of the box. However, the table gains heat.

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